Cylinder head of engine and engine

Abstract

The utility model relates to a cylinder head of an engine and the engine. The cylinder head of the engine comprises a cylinder head body and an air blocking piece protruding out of the outer side of the cylinder head body, the cylinder head body is provided with a spark plug and an air inlet, the air inlet is located on one side of the spark plug, a first heat dissipation air channel is formed in the cylinder head body and communicated with the air inlet, and the air blocking piece and the spark plug are located on the two opposite sides of the air inlet respectively. One end of the air blocking piece at least partially extends to the bottom of the air inlet, and the other end of the air blocking piece at least partially extends to the top of the air inlet. The air inlet is formed in one side of the sparking plug, and when external cooling air is blown into the first heat dissipation air channel from the air inlet, the cooling air makes contact with the sparking plug to reduce the temperature of the surface of the sparking plug; the air blocking piece is arranged on the side, right facing the sparking plug, of the air inlet, when cooling air is blown to the position near the air inlet, the air blocking piece blocks the cooling air to increase the air inlet amount of the air inlet, and then the heat dissipation performance of the cylinder head is improved.

Description

Technical Field

[0001] The present application relates to the technical field of engines, in particular to a cylinder head of an engine and an engine. Background Art

[0002] A wind guide cover is arranged outside a pedal motorcycle engine, and a blower is arranged outside the wind guide cover. The blower blows the cooling air outside the wind guide cover to an air inlet on one side of the spark plug on the cylinder head, so that the cooling air enters a heat dissipation channel in the cylinder head from the air inlet to reduce the temperature of the cylinder head and improve the durability of the cylinder head.

[0003] In the related art, a plurality of heat dissipation fins are arranged on one side of the cylinder head where the air inlet is located, and the plurality of heat dissipation fins are spaced apart along the height direction of the air inlet. However, in this design, part of the cooling air will flow away through the gap between two adjacent heat dissipation fins without entering the heat dissipation channel through the air inlet, resulting in a small air intake volume at the air inlet and poor heat dissipation performance of the cylinder head. Utility Model Content

[0004] Based on this, a cylinder head of an engine and an engine are provided to solve the problem of poor heat dissipation performance of the cylinder head.

[0005] On the one hand, a cylinder head of an engine is provided, which includes a cylinder head body and a wind shield protruding outside the cylinder head body. A spark plug and an air inlet are respectively arranged on the cylinder head body, the air inlet is located on one side of the spark plug, a first heat dissipation air duct is arranged inside the cylinder head body, the air inlet is communicated with the first heat dissipation air duct, the wind shield and the spark plug are respectively located on opposite sides of the air inlet, and one end of the wind shield at least partially extends to the bottom of the air inlet, and the other end of the wind shield at least partially extends to the top of the air inlet.

[0006] In one embodiment, a wind guide member and a convex platform are further respectively arranged on the same side of the cylinder head body where the wind shield is arranged. One end of the wind guide member is connected to the wind shield, the other end of the wind guide member extends along the direction away from the air inlet, the convex platform is spaced apart on one side of the wind guide member, and a second heat dissipation air duct is formed between the convex platform and the wind guide member.

[0007] In one embodiment, the wind shield is integrally formed with the cylinder head body;

[0008] And / or, the wind guide member is integrally formed with the cylinder head body.

[0009] In one embodiment, an oxygen sensor is further arranged on the cylinder head body, and the oxygen sensor is located on the side of the wind shield away from the air inlet.

[0010] In one embodiment, the wind shield is a metal member;

[0011] Alternatively, the windshield member includes a metal layer and an insulating layer, and the insulating layer is wrapped around the outer periphery of the metal layer.

[0012] In one embodiment, a first air outlet is further provided on the cylinder head body. The first air outlet is located on a side of the spark plug away from the air inlet, and the first air outlet is connected to the first heat dissipation duct.

[0013] In one embodiment, the first heat dissipation air duct includes a first air duct, a second air duct and a third air duct connected in sequence, the second air duct spans the first air duct and the third air duct, and a second air outlet and a third air outlet are respectively provided at opposite ends of the second air duct, the first air duct extends to the air inlet at one end away from the second air duct, and the third air duct extends to the first air outlet at one end away from the second air duct.

[0014] On the other hand, an engine is provided, comprising a combustion chamber, wherein the cylinder head is provided on a side of the combustion chamber opposite to the piston.

[0015] In one embodiment, an intake valve seat and an exhaust valve seat are provided on the side of the cylinder head opposite to the piston, and the intake valve seat and the exhaust valve seat are arranged at intervals. Two squeezing components are protruding from the connection part between the cylinder head and the inner wall of the combustion chamber, and the two squeezing components are both arc-shaped. The two squeezing components are respectively located on the opposite sides of the intake valve seat, and the two squeezing components are both surrounded by the circumference of the intake valve seat and the exhaust valve seat. The two squeezing components each include a first guide surface and a second guide surface, the first guide surface is connected to the second guide surface, and the second guide surface is located on the side of the first guide surface close to the piston, the first guide surface forms a first angle with the cross section of the combustion chamber, and the second guide surface forms a second angle with the cross section of the combustion chamber, and the first angle is greater than the second angle.

[0016] In one embodiment, one of the two extruded gas components is a first extruded gas component, and the other is a second extruded gas component. The spark plug is located between the intake valve seat and the second extruded gas component. The height of the first extruded gas component protruding from the inner wall of the combustion chamber is greater than the height of the second extruded gas component protruding from the inner wall of the combustion chamber.

[0017] The cylinder head of the above-mentioned engine is provided with an air inlet on one side of the spark plug. When the blower (not shown in the figure) on the air guide sleeve blows external cooling air from the air inlet to the inside of the first heat dissipation duct, the cooling air contacts the spark plug, thereby reducing the temperature of the spark plug surface and achieving cooling of the spark plug on the cylinder head; the wind shield is provided on the side of the air inlet facing the spark plug. When the cooling air is blown to the vicinity of the air inlet, the cooling air is blocked by the wind shield to prevent the cooling air from being blown away from the side of the air inlet facing the spark plug. In this way, the air intake of the air inlet can be increased, so that a large amount of cooling air enters the first heat dissipation duct from the air inlet, thereby improving the heat dissipation of the cylinder head. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an embodiment of the present application in which an air guide sleeve is arranged on the outside of an engine.

[0019] Figure 2 for Figure 1 Cross-sectional view of AA in the figure.

[0020] Figure 3 for Figure 1 Cross-sectional view of the BB.

[0021] Figure 4 This is a three-dimensional diagram of the cylinder head according to an embodiment of the present application.

[0022] Figure 5 This is a front view of the cylinder head according to one embodiment of the present application.

[0023] Figure 6 for Figure 5 Cross-sectional view of CC.

[0024] Figure 7 Schematic diagram showing the distribution of the extrusion components in the combustion chamber in some embodiments.

[0025] Figure 8 for Figure 3 Enlarged view of point D in the middle.

[0026] In the picture:

[0027] 1. Cylinder head body; 11. First cooling air duct; 111. First air duct; 112. Second air duct; 113. Third air duct; 12. Air inlet; 13. First air outlet; 14. Second air outlet; 15. Third air outlet; 2. Wind shield; 3. Air guide; 4. Boss; 5. Second cooling air duct; 6. Spark plug; 7. Oxygen sensor; 8a. First extrusion component; 8b. Second extrusion component; 81. First guide surface; 82. Second guide surface; 9. Intake valve seat; 10. Exhaust valve seat; 100. Air guide sleeve; 200. Combustion chamber. DETAILED DESCRIPTION

[0028] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0030] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0031] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0032] In this application, unless otherwise clearly defined and limited, when a first feature is described as "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0033] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0034] Refer to Figure 1 、 Figure 2 and Figure 4 , Figure 1 shows a schematic structural diagram of an air guide sleeve sleeved outside an engine in an embodiment of the present application, Figure 2 shows Figure 1 a cross-sectional view taken along A-A in Figure 4 shows a three-dimensional view of a cylinder head, Figure 4 in which the dotted arrow indicates the flow direction of the cooling air. Some embodiments provide a cylinder head of an engine (hereinafter referred to as the cylinder head), including a cylinder head body 1 and a windshield member 2 protruding outside the cylinder head body 1. A spark plug 6 and an air inlet 12 are respectively provided on the cylinder head body 1. The spark plug 6 and the windshield member 2 are on the same side of the cylinder head body 1. The air inlet 12 is on one side of the spark plug 6. A first heat dissipation air duct 11 is provided inside the cylinder head body 1. The air inlet 12 is communicated with the first heat dissipation air duct 11. The windshield member 2 and the spark plug 6 are respectively on both sides of the air inlet 12, and at least a part of one end of the windshield member 2 extends to the bottom of the air inlet 12, and at least a part of the other end of the windshield member 2 extends to the top of the air inlet 12. In this example, the side wall of the air inlet 12 facing the spark plug 6 is vertically arranged. In order to improve the windshield effect of the windshield member 2, the windshield member 2 is also vertically arranged. In actual implementation, the windshield member 2 can also be inclined according to needs.

[0035] The air inlet 12 is arranged on one side of the spark plug 6. When the blower (not shown in the figure) on the air guide sleeve 100 blows the external cooling air from the air inlet 12 into the interior of the first heat dissipation air duct 11, the cooling air contacts the spark plug 6, thereby reducing the temperature on the surface of the spark plug 6 and achieving the cooling of the spark plug 6 on the cylinder head. The wind shield 2 is arranged on the side of the air inlet 12 facing the spark plug 6. When the cooling air is blown near the air inlet 12, the wind shield 2 blocks the cooling air to prevent the cooling air from being blown away from the side of the air inlet 12 facing the spark plug 6. In this way, the air intake volume of the air inlet 12 can be increased, enabling a large amount of cooling air to enter the first heat dissipation air duct 11 from the air inlet 12, thereby improving the heat dissipation performance of the cylinder head.

[0036] Refer to Figure 4 and Figure 5 , Figure 5 Fig. shows a front view of a cylinder head of an embodiment. The cylinder head body 1 is also provided with a wind guide member 3 and a boss 4 on the same side as the wind shield 2. One end of the wind guide member 3 is connected to the wind shield 2, and the other end of the wind guide member 3 extends along the direction away from the air inlet 12. The boss 4 is arranged at intervals above the wind guide member 3, and a second heat dissipation air duct 5 is formed between the boss 4 and the wind guide member 3. The second heat dissipation air duct 5 is used to communicate the gap between the cylinder head body 1 and the air guide sleeve 100. Under the action of the blower, a large amount of cooling air is blown to the area near the air inlet 12. Most of the cooling air enters the second air inlet 12, and a small part of the cooling air can enter the second heat dissipation air duct 5 and be blown to the gap between the cylinder head body 1 and the air guide sleeve 100 through the second heat dissipation air duct 5. In this way, the contact area between the cooling air and the surface of the cylinder head body 1 is increased, enabling the heat dissipation of the surface of the cylinder head body 1. In addition, by blowing the cooling air from the second heat dissipation air duct 5 to the gap between the cylinder head body 1 and the air guide sleeve 100, the air guide sleeve 100 can be dissipated, which is beneficial to improving the service life of the air guide sleeve 100.

[0037] Refer to Figure 1 and Figure 5 , an oxygen sensor 7 is arranged on the cylinder head body 1. The oxygen sensor 7 is located on the side of the wind shield 2 away from the air inlet 12, and the oxygen sensor 7 is used to detect the concentration of oxygen in the gas discharged from the exhaust pipe of the engine.

[0038] In one embodiment, the wind shield 2 is a metal part. The wind shield 2 made of metal can reduce the electromagnetic interference of the spark plug 6 on the oxygen sensor 7 and ensure the stability of the use of the oxygen sensor 7. Preferably, the wind shield 2 is an aluminum sheet or a copper sheet, etc. The wind shield 2 of this kind of material can not only reduce the electromagnetic interference of the spark plug 6 on the oxygen sensor 7, but also has good heat dissipation performance, which is beneficial to transferring the heat on the cylinder head body to the outside and promoting the heat dissipation of the cylinder head. Of course, in actual implementation, the wind shield 2 can also be made of other metal materials, and the specific material of the wind shield 2 is not limited here.

[0039] In another embodiment, the windshield 2 includes a metal layer (not shown in the figure) and an insulating layer (not shown in the figure). The insulating layer wraps around the outer periphery of the metal layer. The windshield 2 with such a structure can also reduce the electromagnetic interference of the spark plug 6 on the oxygen sensor 7 and ensure the stability of the use of the oxygen sensor 7.

[0040] In one example, referring to Figure 4 and Figure 5 , the windshield 2 and the cylinder head body 1 are integrally formed. The air guiding member 3 and the cylinder head body 1 are integrally formed. Integrally forming the windshield with the cylinder head body 1 makes the connection between the windshield and the cylinder head body 1 reliable.

[0041] Of course, in other examples, only the windshield 2 and the cylinder head body 1 can be integrally formed, or only the air guiding member 3 and the cylinder head body 1 can be integrally formed.

[0042] In this embodiment, both the windshield 2 and the air guiding member 3 are ribbed. In other embodiments, the windshield 2 and the air guiding member 3 can both be provided in a plate-like structure; or, the windshield 2 or the air guiding member 3 can be provided in a plate-like structure.

[0043] In some embodiments, referring to Figure 2 and Figure 6 , Figure 6 the dashed arrows in the figure indicate the flow direction of the cooling air. The cylinder head body 1 is further provided with a first air outlet 13. The first air outlet 13 is located on the side of the spark plug 6 away from the air inlet 12. The first air outlet 13 is communicated with the first heat dissipation air duct 11, so that the air inlet 12 and the first air outlet 13 are respectively located on opposite sides of the spark plug 6. When the cooling air enters the first air inlet 12 and exits the first air outlet 13, it can contact the spark plug 6, effectively reducing the temperature of the spark plug 6 and improving the heat dissipation efficiency of the spark plug 6.

[0044] Continuing to refer to Figure 2 and Figure 6, the first cooling air duct 11 includes a first air duct 111, a second air duct 112, and a third air duct 113 that are sequentially connected. The second air duct 112 spans across the first air duct 111 and the third air duct 113, and second air outlets 14 and third air outlets 15 are respectively provided at opposite ends of the second air duct 112. One end of the first air duct 111 away from the second air duct 112 extends to the air inlet 12, and one end of the third air duct 113 away from the second air duct 112 extends to the first air outlet 13. For the first cooling air duct 11 with such a structure, part of the cooling air that enters from the air inlet 12 can sequentially pass through the first air duct 111, the second air duct 112, and the third air duct 113 and be discharged from the first air outlet 13, which is beneficial to extending the blowing path of the cooling air. Another part of the cooling air can be discharged from the second air outlets 14 and the third air outlets 15 outside the cylinder head body 1. Increasing the number of air outlets is beneficial to increasing the flow rate of the cooling air in the first cooling air duct 11, and further improving the heat dissipation performance of the cylinder head.

[0045] In another embodiment, refer to Figure 3 , Figure 3 is Figure 1 the cross-sectional view taken along B-B in

[0046] Refer to Figure 7 , Figure 7 which shows the distribution diagram of the squish components in the combustion chamber in some embodiments. An intake valve seat 9 and an exhaust valve seat 10 are provided on one side of the cylinder head opposite to the piston, and the intake valve seat 9 and the exhaust valve seat 10 are arranged at intervals. Refer to, Figure 3 and Figure 8 , Figure 8 is Figure 3 the enlarged view at D in Figure 8 in Figure 8The virtual straight line located below the second guiding surface 82 in it is parallel to the direction indicated by X. Two air squeezing components are convexly arranged at the connecting part of the cylinder head and the inner side wall of the combustion chamber 200, and both of the two air squeezing components are arc-shaped. The two air squeezing components are respectively located on the opposite sides of the intake valve seat 9, and both of the two air squeezing components surround the circumferences of the intake valve seat 9 and the exhaust valve seat 10. Both of the two air squeezing components include a first guiding surface 81 and a second guiding surface 82. The first guiding surface 81 is connected to the second guiding surface 82, and the second guiding surface 82 is located on the side of the first guiding surface 81 close to the piston. A first included angle α is formed between the first guiding surface 81 and the cross-section of the combustion chamber 200, and a second included angle β is formed between the second guiding surface 82 and the cross-section of the combustion chamber 200. The first included angle is greater than the second included angle, that is, α>β. When the intake valve is opened, the mixed gas enters the combustion chamber 200 from the intake valve. During the intake process, the air flow successively passes through the first guiding surface 81 and the second guiding surface 82. During this period, the space of the air flow in the combustion chamber 200 becomes smaller from larger, which is beneficial to enhancing the tumble of the mixed gas inside the combustion chamber 200. Since both of the two air squeezing components are arc-shaped, a vortex can be formed inside the combustion chamber 200 when the gas flows, so that the mixed gas burns more evenly, which is beneficial to improving the combustion efficiency and improving the emissions.

[0047] Preferably, the first guiding surface 81 and the second guiding surface 82 in the same air squeezing component are connected by an arc surface, so that the first guiding surface 81 and the second guiding surface 82 are smoothly transitioned, which is beneficial to guiding the air flow.

[0048] Specifically, referring to Figure 7 and Figure 8 , one of the two air squeezing components is the first air squeezing component 8a, and the other is the second air squeezing component 8b. The spark plug 6 is located between the intake valve seat 9 and the second air squeezing component 8b. The height of the first air squeezing component 8a protruding from the inner side wall of the combustion chamber 200 is h1, and the height of the second air squeezing component 8b protruding from the inner side wall of the combustion chamber 200 is h2. h1>h2. This design enables the mixed gas inside the combustion chamber 200 to effectively gather around the spark plug 6, ensures the uniformity of the combustion of the mixed gas, is beneficial to improving the combustion efficiency, and improving the emissions.

[0049] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0050] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A cylinder head of an engine, characterized in that, It includes a cylinder head body and a windshield protruding outside the cylinder head body. A spark plug and an air inlet are respectively arranged on the cylinder head body. The air inlet is located on one side of the spark plug. A first heat dissipation air duct is arranged inside the cylinder head body. The air inlet is communicated with the first heat dissipation air duct. The windshield and the spark plug are respectively located on opposite sides of the air inlet. And one end of the windshield at least partially extends to the bottom of the air inlet, and the other end of the windshield at least partially extends to the top of the air inlet.

2. The cylinder head of the engine according to claim 1, characterized in that, On the same side of the cylinder head body where the windshield is arranged, a wind guiding member and a convex platform are also respectively arranged. One end of the wind guiding member is connected to the windshield. The other end of the wind guiding member extends along the direction away from the air inlet. The convex platforms are arranged at intervals on one side of the wind guiding member. A second heat dissipation air duct is formed between the convex platform and the wind guiding member.

3. The cylinder head of the engine according to claim 2, characterized in that, The windshield and the cylinder head body are integrally formed; and / or, the wind guiding member and the cylinder head body are integrally formed.

4. The cylinder head of the engine according to claim 1, characterized in that, An oxygen sensor is also arranged on the cylinder head body. The oxygen sensor is located on the side of the windshield away from the air inlet.

5. The cylinder head of the engine according to claim 4, characterized in that, The windshield is a metal part; or, the windshield includes a metal layer and an insulating layer. The insulating layer wraps around the outer periphery of the metal layer.

6. The cylinder head of the engine according to any one of claims 1 to 5, characterized in that, A first air outlet is also arranged on the cylinder head body. The first air outlet is located on the side of the spark plug away from the air inlet. The first air outlet is communicated with the first heat dissipation air duct.

7. The cylinder head of the engine according to claim 6, characterized in that, The first heat dissipation air duct includes a first air duct, a second air duct and a third air duct which are sequentially communicated. The second air duct straddles the first air duct and the third air duct. And second air outlets and third air outlets are respectively arranged at opposite ends of the second air duct. One end of the first air duct away from the second air duct extends to the air inlet. One end of the third air duct away from the second air duct extends to the first air outlet.

8. An engine, characterized in that, It includes a combustion chamber. On the side of the combustion chamber opposite to the piston, there is the cylinder head according to any one of claims 1 to 7.

9. The engine according to claim 8, characterized in that, On the side of the cylinder head opposite to the piston, an intake valve seat and an exhaust valve seat are arranged. The intake valve seat and the exhaust valve seat are arranged at intervals. At the connecting part between the cylinder head and the inner side wall of the combustion chamber, two air squeezing components are convexly arranged. Both of the two air squeezing components are arc-shaped. The two air squeezing components are respectively located on opposite sides of the intake valve seat. And both of the two air squeezing components surround the periphery of the intake valve seat and the exhaust valve seat. Both of the two air squeezing components include a first guiding surface and a second guiding surface. The first guiding surface is connected to the second guiding surface. And the second guiding surface is located on the side of the first guiding surface close to the piston. The first guiding surface forms a first included angle with the cross section of the combustion chamber. The second guiding surface forms a second included angle with the cross section of the combustion chamber. The first included angle is greater than the second included angle.

10. The engine according to claim 9, characterized in that, One of the two air squeezing components is a first air squeezing component, and the other is a second air squeezing component. The spark plug is located between the intake valve seat and the second air squeezing component. The height of the first air squeezing component protruding from the inner side wall of the combustion chamber is greater than the height of the second air squeezing component protruding from the inner side wall of the combustion chamber.

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